Western-style diet impairs stimulus control by food deprivation state cues: Implications for obesogenic environments

•Energy state cues compete with external cues for control of appetitive behavior.•Rats that eat Western diet (WD) show weakened control by internal energy state cues.•Impaired control by internal, relative to external cues, may promote excess intake.•The learned control of intake by internal cues depends on the hippocampus.•WD may reduce sensitivity to satiety cues by interfering with hippocampal function.